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Cogito

Grade 7 Math · Chapter 8 · Lesson 1

Practice Worksheet

Angle Pairs

Angles that always add to the same total.

10 problems · about 17 minutes · 7.G.B.5

NameDate

Figure — use these to answer the problems

Two angles sharing an arm. Their measures add.
030609012015018050° + 130° = 180°
First angle50
Second angle130
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

1 problem

  1. From “Telling Area from Circumference”

    Edging a round rug. 1 for circumference, 2 for area.

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. Supplementary to 47?

    Answer

  2. What do vertical angles do?

    • They are equal.
    • They add to 180.

  3. Supplementary to 90?

    Answer

  4. Complementary to 20?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Supplementary to 125?

    Answer

  2. Two lines cross and one angle is 63. What is the vertical angle?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

3 problems

  1. The Straight Line

    Two supplementary angles, one is 72. What is the other?

    Answerdegrees

  2. The Right Angle

    Two complementary angles, one is 35. What is the other?

    Answerdegrees

  3. The Crossing

    Two lines cross. One angle is 40. What is the angle opposite it?

    Answerdegrees